Portable Bluetooth speaker



FIG. 1 is a first perspective view of a portable bluetooth speaker showing my design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a cross-sectional view of the portable bluetooth speaker taken in the direction of line 9-9 shown in FIG. 7; and,

FIG. 10 is an enlarged view of design features comprised within a circle 10 in FIG. 2.

The evenly dashed lines shown in the drawings depict portions of the portable bluetooth speaker that form no part of the claimed design. The dash-dot lines encircling enlargement portions of the claimed design form no part of the claimed design. 

CLAIM The ornamental design for a portable bluetooth speaker, as shown and described. 